I am not trying to insult you but I am curious what you consider to be Metal? There are a lot of people who think Slipknot is good metal for example. Anything on the radio is pretty much garbage. I myself am into Power metal and all forms of it. Not into Death metal or black metal or anything like that. But I suppose anyone who is a fan of power metal is very opinionated with the guitars.
Slipknot is Nu Metal, which has more in common with hard rock than it does metal. I'm mainly into Power/Symphonic/Melodic/Folk Metal myself.
I never said this rendition is inherently metal, just that is has characteristics of some metal I listen to. Yes, the guitar work is by no means extraordinary but to say that doesn't make it metal is elitist. I'd say the sound is not great, but not terrible and has enough characteristics of metal for me to not say "this isn't metal". If you really have listened to alot of metal, not just big name bands, you'll know there is some pretty bad stuff out there. So bad that in comparison, this is actually not to hard to listen to at all.
Since when is melodic Metal a genre?
There aren't alot of metal bands that call themselves simply "Melodic Metal" but there are plenty of bands out there that fall under the label of melodic. Primary examples would be the subgenres "Melodic Death Metal" or "Melodic Thrash Metal".
If you haven't heard of this then you haven't listened to a whole lot of metal.